[r6561]

some comments added

[r6560]

[r6559]

[r6558]

[r6557]

[r6556]

[r6555]

[r6554]

[r6553]

[r6552]

[r6551]

[r6546]

[r6543]

[r6542]

[r6541]

[r6540]

[r6539]

[r6536]

[r6535]

[r6534]

[r6533]

[r6531]

[r6527]

[r6526]

[r6524]

[r6523]

[r6510]

  new_rd_*() functions that call optimize_node() did not
  work if current_ir_graph was not set!
  So, the current_ir_graph is now set and restored.
  Moreover, to speed up the default new_*() and new_d_*()
  cases, new_bd_*() functions have been introduced which use
  current_ir_graph, but not current_block and replace
  the use of _rd_ functions in the comfortable i/f

[r6509]

or nodes might be placed wrong!

[r6508]

[r6495]

  When entities are freed, type information is used, so we cannot
  free one type before all entities are freed

[r6485]

[r6482]

[r6481]

[r6480]

[r6479]

[r6478]

some cleanup

[r6476]

[r6475]

[r6470]

[r6463]